Finding the Fourth Proportional to 13,079.05, 19,615.83 and 4,311.91

Step by Step Solution

1. Step 1: Write the proportion equation
   13,079.05 : 19,615.83 = 4,311.91 : x
2. Step 2: Convert to fraction form
   13,079.05/19,615.83 = 4,311.91/x
3. Step 3: Cross multiply
   13,079.05x = 19,615.83 × 4,311.91
4. Step 4: Simplify right side
   13,079.05x = 84,581,693.54
5. Step 5: Solve for x
   x = 84,581,693.54/13,079.05
6. Step 6: Final answer
   x = 6,466.96